<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <title>Title</title>
  <style>
    div{
      width: 150px;
      height: 150px;
      border: 1px solid red;
      /*内边距会影响元素的宽高*/
      padding-top: 100px;
      padding-left: 100px;
    }
  </style>
</head>

<body>
<div>内边距</div>
</body>

</html>